`errors.rs` error codes are not documented with human-readable descriptions

[hman38705]

Labels: contracts, dx
Priority: Low

Description

contracts/predict-iq/src/errors.rs defines contract error codes as enum variants. Without documentation, frontend developers and API integrators cannot map error codes to user-facing messages.

Acceptance Criteria

• Each error variant has a doc comment explaining when it is returned
• Error codes and descriptions published in API_SPEC.md or a dedicated errors reference
• Frontend client.ts maps contract error codes to localized user messages

[Ajibose]

@Ajibose has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

I would love to work on this

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[Happybello365]

@Happybello365 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hello i would like to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Happybello365 to this issue.

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Congratulations, @Happybello365! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

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This issue has been completed by @Happybello365 as part of the Stellar Wave Program's 5th Wave 🥳

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